Coke cooling apparatus



March 15, 1932. c. SCHWARTZ COKE COOLING APPARATUS 1926 2 Sheets-Sheet Filed March 26 nvemto'c C. SCHWARTZ COKE COOLING APPARATUS iled March 26, 1 926 2 Sheets-Sheet 1 1 P 7 1 r1 .1 d1 0 1 1 111 1 1 1 1 1 1 1h 7 1 T 1 11 1 1 0 1 1 1 1 1 I xm 1 1 1 11 1 1 1/ 1 1 1 1 1 1 111 11111111111111111 11 1 1 1 1 111111 111111111111 1111111111111U- w Patented Mar. 15,

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'cAnn'scHwARTz, on ma YORK, 1v, ssienoit, .BY laiESIiIi11 1$,IGIISTMENTS, '10

- INTERNATIONAL COMBUSTION EKGINEERIHG. CORPORATION, A coR-ronAT o OF DELAWARE I co in cooLINe APPARATUS Application 'fiiea March 26, 192 Serial no. 97,483, and in Germany ma 2;, i925. z

This invention relates to method of and' apparatus for-cooling coke and has particular reference to the efficient transfer and ab sorption of heat from the coke.

by means of a current ofgas passed through,

r it; This idea very soon led to-the heat of the soon-showed a tendency to separate the cool cooling gases being industrially utilized and in particular to the hot gasesbeing used for the heating of steam-generators" V In these first plants there was associated with each coke oven'one cooling chamber,

which, in turn, hada special steam-generator allotted to it. It is evident that such cooling apparatus; involved a verycostlyplant and also very expensive working. The further development of coke-cooling ing plant from the coking plant and to siniplity it, that is, tozestablish special coollng towers having as great a volume as that of a number of-coke chambers. The cooling tow-- ers were j designed for continuous work-ing, that 1s to say, the charging of the tower and.

the discharging of the coke were efiected substantially without interrupting the cooling 7 process. Furthermore, the conveyance of the cooling gas was improved bykeeping the entirequantity of gasshut off'frorn the outer air and continuously in circulation, constantlye-taking up heat in the coke tower anddep p p ments arranged behind the finned tubes and preferably forming with-the row of finned livering heat to the steam-generator.

7 Just asnumerous as the im'provements'inthe cooling plant are the improved measures in connection with the method of arranging the ste a1n-generators connected with the coolring tower. After originally complete'g separation of cooling tower and steam' boiler,the' tendency very soon become noticeable to associate the two'in a single structural block.

This tendency led to surrounding the cooling tower-With "a water jacket intended to takeup the heat of the coke directly. 'This lastmentioned method of construction, ,.l1owever,'t did not lead tothe desired result, as it was' not possible in such ast'eam boiler, construct ed'asa hollow'rjackehto control the custom- ;ar'y steam pressures and steain superheats. Cool ng tower ELIIdbOIlQIWGI'G, therefore, s'epto the present. As has been stated, however, v

thIS COHSGIHCUOII'IIlVOlVBS giving up advan- 60.

tages ofan economical. nature, for both the directtransmission.0t heat and also the most compact construct on; possible of cooling chamber; and steam-generator were aban doned' l The present "ivention consists essentially inthe construction of coke-cooling apparatus: in which the advantages ofdire'ct transmissionof the heat'are' made available in an industrially practicable and particularly advantageous manner, Aecordinglto the invention the cooling chamber is bounded as far as possible on all sides by heat absorbing boiler surfaces,jwhich' are com-- posed of tubes; For this purpose so-called finned tubes (tubesILwith lateral fins "or vanes) are preferably einployed,the fins of adjacent tubes overlappingoneanother and; forming a-fiuid-tight andrigid' metal Wall,

1 which tal-iels up alarge part ofthe'heat of the coke directly as radiant heat;- The rest of theboilerheating surfaceis' l-ocated in V water-chamber elements or steep-tube eletubes a unitary boiler aggregate."

ing to the boiler by direct contact and radi atio'n, whichis found by experienceto, need substantially less heat-transferring area than. 0 V s V v a 9 p means of a gaseous medium, is increased acis the case with the tra nsmiss'ionl of heat-by cording to the invention by imparting to the cooling rvessel" an 7 elongated rec'ta-ngular 7 form, so that-the wall"surface has the great} -'est practicable area' n relation to the'volume.

By this -ii'icfrea sin g of the ra'diatingcoke sur- 8:; Theportion of'the heat of the coke pass- I face and of the cooling-action, the cooling 7 plant substantially increased. 7 g

Fig. 3.

According to the invention the wall tubes are only provided with lateral fins or covered on the rear side up to the height of the layer of coke, so that the hot gases can pass transversely between the tubes above the column of coke for the purpose of heating the superheater and the parts of the boiler located behind it. As already stated, the steam-generator is constructed as a watertube boiler with headers or as a steep-tube boiler, and is united with a cooling chamber to form a unitary structural block. The advantages of this compact construction as regards economizing heat consist in the direct absorption of heat by the inner water-tube wall, and, furthermore, in the fact that only comparatively cold parts of the boiler block are in contact with the outer air, and, therefore, a comparatively cheap insulation is 9 suflicie nt to limit the loss by thermal radiation to the lowest practicable amount. As compared with the constructions hitherto known, the invention is particularly distinguished by the fact that for the boiler and the cooling chamber, a single insulation is sufficient, that the gas passages connecting the boiler with the chamber are omitted, that the weight of the structural block is considerably smaller than when boiler and chamber are separated, and that in consequence of the reduction in weight and of the diminution in the space required, the structural supporting of the cooling chamber and the boiler is considerably simplified and cheapened.

The subject matter of the invention is illustrated by way of example in the accompanying drawings, wherein:

Fig. 1 shows a cross-section through a cooling plant according to the lnvention.

, Fig; 1a isa horizontal section taken 011 the line. 1a1a of Fig. 1 with the parts appearing below the plane of the section omitted.

Fig. 2 shows across-section through a row of finned tubes on the line 22 of Fig. 1.

Fig. 0 shows a modified constructional form of the invention.

Flg. l shows a section on the lme l-l oi Fig. 5 shows a cross-section through another constructional formof the tube wall, and

Fig. 6 a partial section through a further constructional form of the invention.

Fig. 1 shows a downwardly expanding cooling chamber 1, which is closed at thetop by a covering hood 2 and at the bottom by a (lischa 'ge conveyor 3. The covering hood 2 is opened inaa known manner before the charging of the chamber 1 by a lifter on the coke-supplying apparatus, (not shown). and is automatically closed after the charging by the action-10f a counter-weight (not shown). The-chamber 1 is laterally bounded by walls consisting or tubes 4. Thewall tubes 4;

by water.

rolled girders 29. I i

Fig. 3 shows a section through a modified are provided up to about the height of the coke filling with laterally overlapping fins 6 (see Fig. 2), while above the coke filling these lateral fins are omitted. The tubes 4: are rolled at the bottom into boiler drums 7 and open at the top into collecting chambers or headers 8, which communicate with a further upper drum 9 (connection not shown). The lower drums 7 are connected with the drums 9 by steep tubes 10, which are subdivided by flue-separating walls 11 into a plurality of nests or bundles. Between the tube walls and the steep tubes 10 are arranged superheaters 12.

Instead of the steep-tube boilers, watertube elements may, oi course, be fitted in, and, similarly, it also lies within the scope of the invention to jacket the front or end walls of the cooling. chamber, as well as the side walls, with steam-generator tubes traversed The supplying o1 cooling gas is effected in a known manner from below by means of the strainer 13, which is connected by pipes 14 with one or more fans 15, the suction pipe of which opens into the last boiler flue.

For the introduction of the hot coke there is arranged in the upper part of the chamber a filling. hopper 16, which projects so far into the chamber 1 that the material, heaping itselfup at the natural angle of repose, does not rise above the height of the tube wall which is closed at the back, so that no pieces of coke can fall through the interstices between the tubes into the boiler flues.

Underneath the filling hopper are provided at suitable cistances breaking beams 17 which split and disintegrate the coke cakes introduced.

The cooling tower is united with the boiler into a unitary comparatively narrow structural block which, on all sides, is shut OE and insulated from the outer air. As Fig. 1 shows, notwithstanding the compact construction, the accessibility of the cooling chamber and of theboiler is quite well guar an-teed, the possibility of superintending the plant ensured, and the removal of fine dust rendered possible in a simple manner. Ac cording to the invention the fire-prooi lining islimited to the region of the high temperatures and consists oi blocks 28 which, in a manner .known in itself, are locked onto constructional form of the cooling plant, wherein the boiler is arranged only on one side of the cooling chamber. This constructional form is particularly suitable for a cooling plant which has only a small quantity of coke passing through it and in which a comparatively small boiler heating: surface sufiices to take up the heat. The side walls ofthe cooling chambers are: here formed of simple water tubes 18: (compare Fig. 4).

located' close' to one anothefl of which [every second tube is bent outwards above the coke filling and leads into 'a special water chamber 30. The fluid tightness of the chamber wall may, if desired, be enhanced by covering the tubes on the rear side. Fig.5 shows a second constructional form of the chamber wall,

whichfaccordin to this 'figure,-'consists of a simple waterttibes; 19, the spaces between m which are covered by filling pieces 20. In order'to obviate a one-sided gas outlet in the constructional form illustrated in Fig. 3, with consequent non-uniform cooling,- apart of the cooling gases are collected on the side oi the cooling chamber opposite to theboiler' in alongitudinal passage. 21 and are led 1 takes place.

through by-pass flues 22 to the boiler side,

wherethe by-pass 'flues open into a longitudinal chamber 23, which is provided throughout its lengt with gas outlet apertures 24;. The longitudinal chamber may be so arranged that the by-passed quantity of heating gas traverses the 'superheater, or, as is the case according to Fig. 3, is passed directly into the boiler fluesf The water cham bers of the wall tubes on the side remote from the boiler preferably communicate 'with those on the boiler side, so that in all the water tubes a unitary circulation of water As theindividual constructional examples show, the wall tubes 4, 18, 19 are not extended right to the discharge end of the cooling chamber. They preferably only extend s0 far downwards as to ensure a suificently direct heat-absorption. Obviously, it also lies entirely within'the scope of the invention to carry the tube walls right through to the discharge'end of the cooling chamber.

In order that the column of coke in its descent may not meet with anygreat resist ance, it is preferable to smooth the transitio-in of the side walls from the metal wall to the masonry wall. According to the invention, this is rendered possible by the wall tubes carrying, at their lower ends, protecting flanges diverging conically upwards, wiph all i which they rest upon the masonry 26.

. this manner disturbing" projections in the side walls are conveniently obviated.

Fig. 6 shows a specially advantageous superheater arrangement above the lateral tube wall 5. The wall tubes are here covered throughouttheir length. 'The hot cooling, gases pasthrough the. superheater12 into the rear boiler flues. The special advantage of this construction consists in the fact that the covering of the cooling chamber admits ofbe-- ing replaced in the range of the high temeratures b a sim lo and inex ensive late covering 27.

I claim 1. Apparatus 01: cooling coke which com-I prises a: cooling chamber having an inlet at the top and an outlet at the bottom, a pluchamber:

rality of water tube boilers 'atthe sides of said chamber each including spaced banks of'spacedboiler tubes, and baffles associated with said banks so as to provide aplu'raIity of gas passes for the up and down-flow of gases through the boiler; andmea-ns; for cir-v culating a cooling medium through the chamher and the'passes of the boilers in a continu- One circuit, saidmeans including a strainer 7 having "an opening" for theintroduction' of; the cooling medium substantially inthe cen-f ter of the chamber.

2; Cokejcooling apparatus comprising an outer shell, a cooling chamber in said 'shellf the lateral walls of which are substantially defined by water tubes diverging downwardj,

ly, a coke inlet at thetop of thecooling chaml I her-and a coke outlet at the bottom of-sa'id;

cooling "chamber." v

3. Coke cooling apparatus comprising wadefining "lateral walls. of a cooling chamber, spaced banks of spaced-boiler tubes, and bat- 185i ter tube boiler meansincluding boiler tubes fles associated'-withsaid banks so'as to-pro down flow of gases through-the boiler, means for admitting coke into said cooling-chain ber,'-means for admittingcoolinggas into said cooling chamber, and a gas outlet *for; sald'cooling chamber through which gases may pass to the boiler passes 4L Coke cooling'apparatus comprising wa'-' ter tube boiler means including boiler tubes defining'lateral walls of a cooling chamber spaced banks of spaced boiler tubes, and baffles: associated with said banks so as to provide a plurality of gas passes for the up andjdown flow 'of' gases through the boiler, means for admitting cokevinto'said cooling chamber, means for admitting cooling gas into saidcooling chamber, a sh-ell'surround ing said boiler means and cooling chamber, a gas outlet for said'cooling chamber through which gases may leave said chamber and pass to the said gas passes, and'means forleadingl gases from said gas passes into said cooling waterftube boiler meansfincluding boiler tubesf defining lateralf walls; or: cooling chamber, spaced banks of spacedb'oiler tubes, 1 and bafiles associatedwith said bank's s'o asto provide ja-plura' lity' of'gas 'p assesT forthe upvide a plurality of gas p'asses for the upaand 3 g and down flow of gases through the boiler, means for admitting coke into said cooling chamber, a gas outlet for said cooling chamher through which gases may pass to said gas passes, and means for leading gas from said gas passes into said cooling chamber, together with a refractory enclosure for said boiler means and cooling chamber.

7. Apparatus for cooling coke comprising an outer shell, boiler means in said shell including water tubes spaced from said outer shell defining lateral walls of a cooling chamber and spaced banks of water tubes each comprising a plurality of spaced water tubes located in the space between said first men tioned water tubes and said shell, a gas outlet for said cooling chamber, means for introducing coke into said chamber, and means for circulating a gaseous medium through said cooling chamber and over said banks of water tubes. Y r

8. Apparatus for cooling coke comprising an outer shell, boiler means in said shell including Water tubes spaced from said outer shell defining lateral walls of a cooling chamber and spaced banks of water tubes each comprising a plurality of spacedwater tubes located in the space between said first mentioned water tubes and said shell, a gas outlet for said cooling chamber, means for introducing coke into said chamber, and means for circulating a gaseous medium through said cooling chamber and over said banks of water tubes, together with superheater elements located in the aforesaid space, and means for leading steam from the boiler means to the superheater elements.

9. Coke cooling apparatus comprising boiler means including water tubes defining lateral walls of a cooling chamber, spaced banks of spaced boiler tubes, and baffles associated with said banks so as to provide a;

plurality of gas passes for the up and down flow of gases through the boiler; the water tubes defining opposite Walls of said cooling chamber beingupwardlyinclined toward eachother, means for admitting coke lnto said chamber, and means for admitting cooling gas into said chamber. 7

10: Coke cooling apparatus comprising boiler means including upright water tubes defining lateral walls of a cooling chamber, spaced banks of spaced boiler tubes, and baffies associated with said banks so as to provide a pluralityof gas passes for the up and down flow of gases through the boiler, the tubes defining opposite walls of said cooling chamber being upwardly inclined toward each other', means for admittingcoke into said chamber, and meansfor admitting cool ing gas in'to sa'id chamber, the tubes defining lateralwalls for thecooling chamber being provided. with fins terminating short of the upper vendsof' the tubes to permit gas topass 'fromsaid; cooling chamber to said-gas passes. 1'

signed my name.

11. In apparatus for cooling coke, upright water tubes substantially defining lateral walls of a cooling chamber, said tubes being spaced apart, and fins on said tubes terminating short of the upper ends of the'tubes and closing the space between the tubes for a substantial portion of the length of the tubes.

In testimony whereof I have hereunto 

